1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.data.osm.visitor.paint;
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3 |
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4 | import java.awt.Color;
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5 | import java.awt.Graphics2D;
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6 | import java.awt.geom.GeneralPath;
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7 | import java.awt.geom.Path2D;
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8 | import java.awt.geom.Rectangle2D;
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9 | import java.util.Iterator;
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10 |
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11 | import org.openstreetmap.josm.Main;
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12 | import org.openstreetmap.josm.data.osm.BBox;
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13 | import org.openstreetmap.josm.data.osm.DataSet;
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14 | import org.openstreetmap.josm.data.osm.Node;
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15 | import org.openstreetmap.josm.data.osm.Way;
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16 | import org.openstreetmap.josm.data.osm.WaySegment;
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17 | import org.openstreetmap.josm.gui.MapViewState;
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18 | import org.openstreetmap.josm.gui.MapViewState.MapViewPoint;
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19 | import org.openstreetmap.josm.gui.MapViewState.MapViewRectangle;
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20 | import org.openstreetmap.josm.gui.NavigatableComponent;
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21 | import org.openstreetmap.josm.tools.CheckParameterUtil;
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22 | import org.openstreetmap.josm.tools.Logging;
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23 |
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24 | /**
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25 | * <p>Abstract common superclass for {@link Rendering} implementations.</p>
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26 | * @since 4087
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27 | */
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28 | public abstract class AbstractMapRenderer implements Rendering {
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29 |
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30 | /** the graphics context to which the visitor renders OSM objects */
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31 | protected final Graphics2D g;
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32 | /** the map viewport - provides projection and hit detection functionality */
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33 | protected final NavigatableComponent nc;
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34 |
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35 | /**
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36 | * The {@link MapViewState} to use to convert between coordinates.
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37 | */
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38 | protected final MapViewState mapState;
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39 |
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40 | /** if true, the paint visitor shall render OSM objects such that they
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41 | * look inactive. Example: rendering of data in an inactive layer using light gray as color only. */
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42 | protected boolean isInactiveMode;
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43 | /** Color Preference for background */
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44 | protected Color backgroundColor;
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45 | /** Color Preference for inactive objects */
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46 | protected Color inactiveColor;
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47 | /** Color Preference for selected objects */
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48 | protected Color selectedColor;
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49 | /** Color Preference for members of selected relations */
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50 | protected Color relationSelectedColor;
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51 | /** Color Preference for nodes */
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52 | protected Color nodeColor;
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53 |
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54 | /** Color Preference for hightlighted objects */
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55 | protected Color highlightColor;
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56 | /** Preference: size of virtual nodes (0 displayes display) */
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57 | protected int virtualNodeSize;
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58 | /** Preference: minimum space (displayed way length) to display virtual nodes */
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59 | protected int virtualNodeSpace;
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60 |
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61 | /** Preference: minimum space (displayed way length) to display segment numbers */
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62 | protected int segmentNumberSpace;
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63 |
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64 | /**
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65 | * <p>Creates an abstract paint visitor</p>
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66 | *
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67 | * @param g the graphics context. Must not be null.
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68 | * @param nc the map viewport. Must not be null.
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69 | * @param isInactiveMode if true, the paint visitor shall render OSM objects such that they
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70 | * look inactive. Example: rendering of data in an inactive layer using light gray as color only.
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71 | * @throws IllegalArgumentException if {@code g} is null
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72 | * @throws IllegalArgumentException if {@code nc} is null
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73 | */
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74 | public AbstractMapRenderer(Graphics2D g, NavigatableComponent nc, boolean isInactiveMode) {
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75 | CheckParameterUtil.ensureParameterNotNull(g);
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76 | CheckParameterUtil.ensureParameterNotNull(nc);
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77 | this.g = g;
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78 | this.nc = nc;
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79 | this.mapState = nc.getState();
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80 | this.isInactiveMode = isInactiveMode;
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81 | }
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82 |
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83 | /**
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84 | * Draw the node as small square with the given color.
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85 | *
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86 | * @param n The node to draw.
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87 | * @param color The color of the node.
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88 | * @param size size in pixels
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89 | * @param fill determines if the square mmust be filled
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90 | */
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91 | public abstract void drawNode(Node n, Color color, int size, boolean fill);
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92 |
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93 | /**
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94 | * Draw an number of the order of the two consecutive nodes within the
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95 | * parents way
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96 | *
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97 | * @param p1 First point of the way segment.
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98 | * @param p2 Second point of the way segment.
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99 | * @param orderNumber The number of the segment in the way.
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100 | * @param clr The color to use for drawing the text.
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101 | * @since 10827
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102 | */
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103 | protected void drawOrderNumber(MapViewPoint p1, MapViewPoint p2, int orderNumber, Color clr) {
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104 | if (isSegmentVisible(p1, p2) && isLargeSegment(p1, p2, segmentNumberSpace)) {
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105 | String on = Integer.toString(orderNumber);
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106 | int strlen = on.length();
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107 | double centerX = (p1.getInViewX()+p2.getInViewX())/2;
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108 | double centerY = (p1.getInViewY()+p2.getInViewY())/2;
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109 | double x = centerX - 4*strlen;
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110 | double y = centerY + 4;
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111 |
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112 | if (virtualNodeSize != 0 && isLargeSegment(p1, p2, virtualNodeSpace)) {
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113 | y = centerY - virtualNodeSize - 3;
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114 | }
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115 |
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116 | g.setColor(backgroundColor);
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117 | g.fill(new Rectangle2D.Double(x-1, y-12, 8*strlen+1, 14));
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118 | g.setColor(clr);
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119 | g.drawString(on, (int) x, (int) y);
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120 | }
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121 | }
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122 |
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123 | /**
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124 | * Draws virtual nodes.
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125 | *
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126 | * @param data The data set being rendered.
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127 | * @param bbox The bounding box being displayed.
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128 | */
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129 | public void drawVirtualNodes(DataSet data, BBox bbox) {
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130 | if (virtualNodeSize == 0 || data == null || bbox == null)
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131 | return;
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132 | // print normal virtual nodes
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133 | GeneralPath path = new GeneralPath();
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134 | for (Way osm : data.searchWays(bbox)) {
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135 | if (osm.isUsable() && !osm.isDisabledAndHidden() && !osm.isDisabled()) {
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136 | visitVirtual(path, osm);
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137 | }
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138 | }
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139 | g.setColor(nodeColor);
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140 | g.draw(path);
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141 | try {
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142 | // print highlighted virtual nodes. Since only the color changes, simply
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143 | // drawing them over the existing ones works fine (at least in their current simple style)
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144 | path = new GeneralPath();
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145 | for (WaySegment wseg: data.getHighlightedVirtualNodes()) {
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146 | if (wseg.way.isUsable() && !wseg.way.isDisabled()) {
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147 | visitVirtual(path, wseg.toWay());
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148 | }
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149 | }
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150 | g.setColor(highlightColor);
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151 | g.draw(path);
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152 | } catch (ArrayIndexOutOfBoundsException e) {
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153 | // Silently ignore any ArrayIndexOutOfBoundsException that may be raised
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154 | // if the way has changed while being rendered (fix #7979)
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155 | // TODO: proper solution ?
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156 | // Idea from bastiK:
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157 | // avoid the WaySegment class and add another data class with { Way way; Node firstNode, secondNode; int firstIdx; }.
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158 | // On read, it would first check, if the way still has firstIdx+2 nodes, then check if the corresponding way nodes are still
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159 | // the same and report changes in a more controlled manner.
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160 | Logging.trace(e);
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161 | }
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162 | }
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163 |
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164 | /**
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165 | * Reads the color definitions from preferences. This function is <code>public</code>, so that
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166 | * color names in preferences can be displayed even without calling the wireframe display before.
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167 | */
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168 | public void getColors() {
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169 | this.backgroundColor = PaintColors.BACKGROUND.get();
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170 | this.inactiveColor = PaintColors.INACTIVE.get();
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171 | this.selectedColor = PaintColors.SELECTED.get();
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172 | this.relationSelectedColor = PaintColors.RELATIONSELECTED.get();
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173 | this.nodeColor = PaintColors.NODE.get();
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174 | this.highlightColor = PaintColors.HIGHLIGHT.get();
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175 | }
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176 |
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177 | /**
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178 | * Reads all the settings from preferences. Calls the @{link #getColors}
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179 | * function.
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180 | *
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181 | * @param virtual <code>true</code> if virtual nodes are used
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182 | */
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183 | protected void getSettings(boolean virtual) {
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184 | this.virtualNodeSize = virtual ? Main.pref.getInteger("mappaint.node.virtual-size", 8) / 2 : 0;
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185 | this.virtualNodeSpace = Main.pref.getInteger("mappaint.node.virtual-space", 70);
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186 | this.segmentNumberSpace = Main.pref.getInteger("mappaint.segmentnumber.space", 40);
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187 | getColors();
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188 | }
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189 |
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190 | /**
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191 | * Checks if a way segemnt is large enough for additional information display.
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192 | *
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193 | * @param p1 First point of the way segment.
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194 | * @param p2 Second point of the way segment.
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195 | * @param space The free space to check against.
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196 | * @return <code>true</code> if segment is larger than required space
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197 | * @since 10827
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198 | */
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199 | public static boolean isLargeSegment(MapViewPoint p1, MapViewPoint p2, int space) {
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200 | return p1.oneNormInView(p2) > space;
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201 | }
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202 |
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203 | /**
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204 | * Checks if segment is visible in display.
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205 | *
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206 | * @param p1 First point of the way segment.
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207 | * @param p2 Second point of the way segment.
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208 | * @return <code>true</code> if segment may be visible.
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209 | * @since 10827
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210 | */
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211 | protected boolean isSegmentVisible(MapViewPoint p1, MapViewPoint p2) {
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212 | MapViewRectangle view = mapState.getViewArea();
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213 | // not outside in the same direction
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214 | return (p1.getOutsideRectangleFlags(view) & p2.getOutsideRectangleFlags(view)) == 0;
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215 | }
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216 |
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217 | /**
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218 | * Creates path for drawing virtual nodes for one way.
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219 | *
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220 | * @param path The path to append drawing to.
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221 | * @param w The ways to draw node for.
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222 | * @since 10827
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223 | */
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224 | public void visitVirtual(Path2D path, Way w) {
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225 | Iterator<Node> it = w.getNodes().iterator();
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226 | MapViewPoint lastP = null;
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227 | while (it.hasNext()) {
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228 | Node n = it.next();
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229 | if (n.isLatLonKnown()) {
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230 | MapViewPoint p = mapState.getPointFor(n);
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231 | if (lastP != null && isSegmentVisible(lastP, p) && isLargeSegment(lastP, p, virtualNodeSpace)) {
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232 | double x = (p.getInViewX()+lastP.getInViewX())/2;
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233 | double y = (p.getInViewY()+lastP.getInViewY())/2;
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234 | path.moveTo(x-virtualNodeSize, y);
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235 | path.lineTo(x+virtualNodeSize, y);
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236 | path.moveTo(x, y-virtualNodeSize);
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237 | path.lineTo(x, y+virtualNodeSize);
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238 | }
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239 | lastP = p;
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240 | }
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241 | }
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242 | }
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243 | }
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